CN114759059A - Electronic device and method for manufacturing the same - Google Patents
Electronic device and method for manufacturing the same Download PDFInfo
- Publication number
- CN114759059A CN114759059A CN202210421319.6A CN202210421319A CN114759059A CN 114759059 A CN114759059 A CN 114759059A CN 202210421319 A CN202210421319 A CN 202210421319A CN 114759059 A CN114759059 A CN 114759059A
- Authority
- CN
- China
- Prior art keywords
- emitting unit
- light emitting
- substrate
- light
- diode unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/029—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel
- G09G2320/0295—Improving the quality of display appearance by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel by monitoring each display pixel
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/043—Preventing or counteracting the effects of ageing
- G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements
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- General Chemical & Material Sciences (AREA)
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- Led Device Packages (AREA)
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Abstract
The invention provides an electronic device, comprising: the LED chip comprises a substrate, a plurality of conducting pads, an adhesion layer, a first diode unit, a second diode unit, a third diode unit and a fourth diode unit, wherein the first diode unit, the second diode unit, the third diode unit and the fourth diode unit are arranged on the substrate; the adhesive layer is provided with a plurality of conducting particles in a patterned arrangement, the conducting particles are arranged corresponding to the conducting pads, and the distance between the region where the conducting particles are arranged and the outer edge of at least one of the conducting pads is 0-30 μm; the first diode unit, the second diode unit, the third diode unit and the fourth diode unit are electrically connected with the conductive pads through the conductive particles respectively; wherein a first interval between the first diode unit and the second diode unit is different from a second interval between the third diode unit and the fourth diode unit, wherein the adhesive layer has a first height, the first diode unit has a second height, and the second height is greater than the first height.
Description
The scheme is a divisional application of Chinese patent application with application number of 201810820379.9 filed 24.7.8.7.8
Technical Field
The present invention relates to an electronic device and a method for manufacturing the same, and more particularly, to a process for replacing a light emitting unit in an electronic device.
Background
With the rapid development of electronic products, consumers have higher requirements and expectations for the quality and functions of the electronic products. Light Emitting Diodes (LEDs) are expected to be used in future electronic applications. Micro LED (micro LED) technology is a new electronic device technology, and has the characteristics of miniaturization (or array), but because the size of micro LED is quite small, it is generally transferred to a target substrate (array substrate) in batch mode during the manufacturing process. When the performance of the LED is detected (including optical and electrical detection), the LED is determined not to be designed, and the micro LED with a small size needs to be replaced, which is technically difficult.
Therefore, it is one of the issues addressed by the present industry to develop a method for effectively replacing (or repairing) the micro LED.
Disclosure of Invention
In some embodiments, the present invention provides an electronic device, comprising: a substrate; a plurality of conductive pads disposed on the substrate; an adhesive layer disposed on the substrate and having a plurality of conductive particles arranged in a patterned manner, wherein the plurality of conductive particles are arranged corresponding to the plurality of conductive pads, and a distance between a region where the plurality of conductive particles are disposed and an outer edge of at least one of the plurality of conductive pads is between 0 μm and 30 μm; the first diode unit, the second diode unit, the third diode unit and the fourth diode unit are arranged on the substrate and are electrically connected with the conductive pads through the conductive particles respectively; the second diode unit is adjacent to the first diode unit along a first direction, the fourth diode unit is adjacent to the third diode unit along the first direction, the third diode unit is adjacent to the first diode unit along a second direction perpendicular to the first direction, the fourth diode unit is adjacent to the second diode unit along the second direction, a first distance between the first diode unit and the second diode unit is different from a second distance between the third diode unit and the fourth diode unit, the adhesion layer has a first height, the first diode unit has a second height, and the second height is larger than the first height.
In some embodiments, the present invention provides an electronic device, comprising: a substrate; a plurality of conductive pads disposed on the substrate; a first light emitting unit, a second light emitting unit, a third light emitting unit and a fourth light emitting unit disposed on the substrate; and a plurality of conductive particles, wherein the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit are electrically connected to the plurality of conductive pads through the plurality of conductive particles, respectively, and a distance between a region where the plurality of conductive particles are disposed and an outer edge of at least one of the plurality of conductive pads is between 0 μm and 30 μm; the second light-emitting unit is adjacent to the first light-emitting unit along a first direction, the fourth light-emitting unit is adjacent to the third light-emitting unit along the first direction, the third light-emitting unit is adjacent to the first light-emitting unit along a second direction perpendicular to the first direction, the fourth light-emitting unit is adjacent to the second light-emitting unit along the second direction, and a first distance between the first light-emitting unit and the second light-emitting unit is different from a second distance between the third light-emitting unit and the fourth light-emitting unit.
In order to make the features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, wherein:
FIG. 1 shows a flow chart of a method of manufacturing an electronic device according to some embodiments of the invention;
FIGS. 2A-2H are schematic cross-sectional views of an electronic device at an intermediate stage of processing, in accordance with some embodiments of the present invention;
FIGS. 3A-3H are schematic cross-sectional views illustrating an electronic device at an intermediate stage of processing according to further embodiments of the present invention;
FIG. 4A is a schematic cross-sectional view of an electronic device according to some embodiments of the invention;
FIG. 4B is a schematic top view of the region A shown in FIG. 4A;
FIG. 5 is a schematic top view of an electronic device according to some embodiments of the inventions;
FIG. 6 is a schematic top view of an electronic device according to some embodiments of the inventions;
FIG. 7 is a schematic top view of an electronic device according to some embodiments of the inventions.
Description of the symbols
10 method for manufacturing electronic device
100A, 100B, 100C, 100D, 100E electronic devices;
102. 102' a first substrate;
104 a carrier substrate;
200U、200U1、200U2、200U3a first light emitting unit;
200U' of a first light emitting unit to be replaced;
202 a first semiconductor layer;
204 a second semiconductor layer;
a 206 quantum well layer;
208 a first electrode;
210 a second electrode;
302 a second substrate;
304 an adhesive layer;
304m of a substrate;
304p conductive particles;
306 means for placing;
308, a conductive pad;
308E edge;
200S, 302S, 304S top surface;
CL cleaning process;
d1a distance;
H1a first height;
H2a second height;
an LO removal process;
P1a first pitch;
P2a second pitch;
P3a third pitch;
P4a fourth pitch;
S1an interface;
s11, S13, S14, S15, S17, S19 and S21
An R region;
t detection
VC is vacant.
Detailed Description
The structure and manufacturing method of the electronic device of the present invention will be described in detail below. The following description provides many different embodiments for implementing different aspects of the invention. The particular components and arrangements described below are meant to be illustrative only and not limiting as to the scope of the invention which is to be given the full breadth of the claims appended and any and all equivalents thereof. Repeated reference numerals or labels may be used in various embodiments to simply and clearly describe some embodiments of the invention and are not intended to represent any relationship between the various embodiments and/or structures discussed. When a first material layer is disposed on or over a second material layer, the first material layer and the second material layer are in direct contact. Alternatively, one or more layers of other materials may be present, in which case there may not be direct contact between the first and second layers of material.
It should be understood that the components or devices of the drawings may exist in a variety of forms well known to those of ordinary skill in the art. In addition, relative terms, such as "lower" or "bottom" or "upper" or "top," may be used in relation to one element of the figures to describe the relative relationship of one element to another. It will be understood that if the device of the drawings is turned over with its top and bottom reversed, elements described as being on the "lower" side will be elements on the "upper" side. The embodiments of the present invention can be understood together with the accompanying drawings, which are incorporated in and constitute a part of this specification. It is to be understood that the figures are not drawn to scale and that in fact any size enlargement or reduction of components may be possible in order to clearly show the features of the present invention, while the same or similar components will be denoted by similar symbols in the description and the figures.
It will be understood that although the terms first, second, third, etc. may be used herein to describe various elements, components, or sections, these terms are used only to distinguish one element, component, or section from another, and should not be limited.
As used herein, the terms "about", "approximately", "substantially" generally mean within 20%, preferably within 10%, more preferably within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% of a given value or range. The quantities given herein are approximate quantities, that is, the meanings of "about", "about" and "substantially" are implied unless otherwise specified.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Such terms, for example, as defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
In some embodiments of the present invention, unless otherwise defined, terms related to bonding and electrical connection may refer to two structures being in direct contact or may also refer to two structures not being in direct contact, wherein another structure is disposed between the two structures. And the terms "coupled" and "electrically connected" may also include the case where both structures are movable or fixed.
According to some embodiments of the present invention, a method for manufacturing an electronic device is provided, which can replace (or repair) a light emitting unit in a batch manner. The step of replacing the light emitting units can replace a plurality of light emitting units at the same time or sequentially replace a plurality of light emitting units, and the invention is not limited thereto. The manufacturing method of the invention is not limited by the size of the light-emitting unit, and the light-emitting units with different sizes can be replaced. The method can improve the replacement efficiency, quality or yield of the light-emitting unit with smaller size.
According to some embodiments of the present invention, an electronic device is provided, which includes a light emitting unit replaced (or repaired) by the above method, wherein the pitch of the replaced light emitting unit may not be the same as the pitch of other light emitting units that are not replaced.
FIG. 1 shows a flow diagram of a method 10 of manufacturing an electronic device according to some embodiments of the invention. In some embodiments, additional processing steps may be provided before, during, and/or after the method 10 for manufacturing electronic devices. In different embodiments, some of the described stages (or steps) may be deleted or replaced as appropriate, or the order of the steps may be interchanged as appropriate. In various embodiments, some of the features of the electronic device described below may be replaced or deleted, or additional features may be added to the electronic device. Fig. 2A-2H are cross-sectional views of an electronic device 100A formed using the method 10 of fig. 1 at an intermediate stage of fabrication, according to some embodiments of the present invention.
First, referring to fig. 1 and fig. 2A, in some embodiments, the method 10 for manufacturing an electronic device includes a step S11 of detecting a plurality of first light-emitting units 200U disposed on the first substrate 102 (i.e., performing the detection T) to select a first light-emitting unit 200U' to be replaced. As shown in fig. 2A, the first substrate 102 may be disposed on a carrier substrate 104, for example. In some embodiments, a plurality of first substrates 102 may be disposed on the carrier substrate 104, for example. In some embodiments, the first substrate 102 may be, for example, a native substrate (or referred to as a mother substrate) or a non-native substrate (non-mother substrate) of the first light emitting unit 200U, but the invention is not limited thereto. In some embodiments, the first substrate 102 may include a sapphire (sapphire) substrate, a glass substrate, a red light substrate, other suitable substrates, or a combination thereof, but the invention is not limited thereto. The material of the first substrate 102 includes, for example, silicon carbide (SiC), gallium arsenide (GaAs), gallium phosphide GaP, other suitable compounds, or a combination thereof, but the present invention is not limited thereto. In some embodiments, the carrier substrate 104 may include silicon, glass, polymer, metal, or ceramic, or a combination thereof, but the invention is not limited thereto. The polymer substrate may include Polycarbonate (PC), Polyimide (PI), polyethylene terephthalate (PET), or rubber, but the present invention is not limited thereto.
The first light emitting unit 200U may include a light-emitting diode (LED), a micro light-emitting diode (micro light-emitting diode) or a mini light-emitting diode (mini LED), for example, but the invention is not limited thereto. In some embodiments, the chip size of the light emitting diode is about 300 micrometers (μm) to 10 millimeters (mm), the chip size of the micro light emitting diode (mini LED) is about 100 micrometers (μm) to 300 micrometers (μm), and the chip size of the micro light emitting diode (micro LED) is about 1 micrometer (μm) to 100 micrometers (μm), but the invention is not limited thereto.
In some embodiments, the first light emitting unit 200U may, for example, include a first semiconductor layer 202, a second semiconductor layer 204, a quantum well (quantum well) layer 206 disposed between the first semiconductor layer 202 and the second semiconductor layer 204, and a first electrode 208 and a second electrode 210 electrically connected to the first semiconductor layer 202 and the second semiconductor layer 204, respectively. The first semiconductor layer 202 and the second semiconductor layer 204 may have opposite conductive characteristics. For example, in some embodiments, the first semiconductor layer 202 is a p-type semiconductor and the second semiconductor layer 204 is an n-type semiconductor. In other embodiments, the first semiconductor layer 202 is an n-type semiconductor and the second semiconductor layer 204 is a p-type semiconductor.
In some embodiments, the first semiconductor layer 202 or the second semiconductor layer 204 may be formed of gallium nitride (GaN), but is not limited thereto. In some embodiments, the quantum well layer 206 may include a Single Quantum Well (SQW) or a Multiple Quantum Well (MQW), and the material of the quantum well layer 206 may include indium gallium nitride (InGaN), gallium nitride (GaN), or a combination thereof, but is not limited thereto. In some embodiments, the first electrode 208 and the second electrode 210 may serve as p/n electrodes of the light emitting unit 200U. In some embodiments, the first electrode 208 and the second electrode 210 may be formed of a metallic conductive material, a transparent conductive material, or a combination thereof. The metal conductive material may include copper, aluminum, tungsten, titanium, gold, platinum, nickel, other suitable metal conductive materials, alloys thereof, or combinations thereof, but is not limited thereto. The transparent conductive material may include a Transparent Conductive Oxide (TCO), such as Indium Tin Oxide (ITO), tin oxide (SnO), zinc oxide (ZnO), Indium Zinc Oxide (IZO), Indium Gallium Zinc Oxide (IGZO), Indium Tin Zinc Oxide (ITZO), Antimony Tin Oxide (ATO), Antimony Zinc Oxide (AZO), other suitable transparent conductive materials, or a combination thereof, but is not limited thereto.
Although the light emitting unit is shown as a flip chip type light emitting diode, the invention is not limited thereto. In other embodiments, the light emitting unit may also be a vertical type light emitting diode.
The above-mentioned detection T can be used to test whether the quality or performance of the first light-emitting unit 200U meets the design specification. In some embodiments, the detection T may be used to test the photoelectric characteristics of the first light-emitting unit 200U, but the present invention is not limited thereto. The detection T can be carried out according to the actual need, using suitable methods known in the art. In some embodiments, the first light emitting unit 200U' to be replaced can be selected by detecting the test result of T. For example, the first light emitting unit 200U' to be replaced may be a light emitting unit whose photoelectric property does not meet a design specification or an abnormality (abnormal), but the present invention is not limited thereto. For example, the light emitting unit to be replaced (or abnormal) may be a light emitting unit that flickers, continuously emits light, or emits a small amount of light when the sensing current or the driving circuit gives the off signal, or a light emitting unit that flickers, emits a small amount of light, or fails to emit light when the sensing current or the driving circuit gives the on signal. Alternatively, in some embodiments, the light emitting unit to be replaced (or abnormal) may represent a light emitting unit that emits light whose brightness, wavelength, or voltage does not conform to a design value, but the present invention is not limited thereto. In some embodiments, the light emitting unit to be replaced (or abnormal) may be, for example, a light emitting unit whose appearance is significantly damaged or deformed. It should be understood that although only one first light-emitting unit 200U 'to be replaced is shown in the drawings, in practice, the first substrate 102 may have a plurality of first light-emitting units 200U' to be replaced, for example.
Next, with reference to fig. 1 and fig. 2A, in step S13, the first light-emitting unit 200U' to be replaced is removed from the first substrate 102. The removal process LO may be performed to remove the first light emitting unit 200U' from the first substrate 102. As shown in fig. 2B, after removing the first light-emitting unit 200U' to be replaced, the first substrate 102 is provided with (or formed with) a vacant site VC. In some embodiments, the removal process LO may include a Laser Lift Off (LLO) process, a dry (or wet) chemical etching, a laser bombardment (laser bombardment), or other suitable processes or combinations thereof, but the invention is not limited thereto. The removal process LO may, for example, peel off the interface S1 between the first substrate 102 and the first light emitting unit 200U'.
Next, referring to fig. 1 and fig. 2C to 2D, in step S15, the second light-emitting unit 200R is transferred onto the second substrate 302, and the position of the second light-emitting unit 200R corresponds to the empty space VC on the first substrate 102 (i.e., the first light-emitting unit 200U' to be replaced). In detail, if there is no first light-emitting unit 200U ' to be replaced on the first substrate 102, the first light-emitting unit 200U on the first substrate 102 may be transferred to a second substrate 302 (e.g., a target substrate), for example, and the process may include aligning the first substrate 102 and the second substrate 302 (e.g., aligning through an alignment mark, but the invention is not limited thereto), for example, if when there is a first light-emitting unit 200U ' to be replaced on the first substrate 102, the first light-emitting unit 200U ' to be replaced may be removed from the first substrate 102, and after the removal, the first substrate 102 may have (or form) a vacancy VC, and then the first light-emitting unit 200U that is not replaced (i.e., does not need to be replaced) on the first substrate 102 may be transferred to the second substrate 302 (e.g., the target substrate), and the second light-emitting unit 200R (which is used to replace the removed first light-emitting unit 200U ') on the other first substrate 102 ' may also be transferred to the second base In the plate 302, the above-mentioned transferring step may, for example, require aligning the first substrate 102 or the other first substrate 102 ' with the second substrate 302, so in order to improve the convenience of transferring, or reduce the mutual influence between the first light-emitting unit 200U ' or the second light-emitting unit 200R transferred onto the second substrate 302, the position of the second light-emitting unit 200R on the first substrate 102 ' may, for example, correspond to the position of the empty VC on the first substrate 102 in advance. For example, if the vacancy VC on the first substrate 102 is located at a second position, the second light-emitting unit 200R at the second position on the first substrate 102' can be transferred. The present invention does not limit the need to transfer the first light-emitting unit 200U on the first substrate 102, which is not replaced, to the second substrate 302 first, or to transfer the second light-emitting unit 200R on another first substrate 102' to the second substrate 302 first, and the details will be described later.
In some embodiments, the first substrate 102' may have at least one second light emitting unit 200R thereon, for example. The first and second light emitting units 200U' and 200R to be replaced may be, for example, light emitting units emitting substantially the same wavelength (e.g., including one of blue, green, or red bands, but the invention is not limited thereto). In some embodiments, the pitch between the second light emitting cells 200R on the first substrate 102' is substantially the same as the pitch between the first light emitting cells 200U on the first substrate 102. In some embodiments, the size of the second light emitting unit 200R on the first substrate 102' is substantially the same as the size of the first light emitting unit 200U on the first substrate 102. In some embodiments, the second light emitting unit 200R formed on the first substrate 102' may be used as a light emitting unit array dedicated for replacement (or repair). In some embodiments, the second light emitting unit 200R on the first substrate 102' may have been tested for test T, for example, to confirm the performance as a light emitting unit meeting the design specification.
In some embodiments, the second light emitting unit 200R corresponding to the void VC on the first substrate 102' may be removed by the removal process LO and transferred onto the second substrate 302. In some embodiments, the removal process LO may include a laser lift-off (LLO) process, a dry (or wet) chemical etch, a laser bombardment, or other suitable process or combination of the foregoing, but the invention is not limited thereto.
It should be understood that although only one light emitting unit is shown to be removed or replaced in the illustrated embodiment, in other embodiments, a plurality of light emitting units may be removed or replaced at the same time. That is, a plurality of empty spaces VC may be formed on the first substrate 102, and replaced by a plurality of second light emitting units 200R corresponding to the empty spaces VC on another first substrate 102'.
In addition, as shown in fig. 2C and 2D, in some embodiments, the method 10 further includes a step S14, i.e., before the second light emitting unit 200R is transferred to the second substrate 302 (step S15), an adhesive layer 304 may be formed on the second substrate 302, for example. The adhesive layer 304 may be used, for example, to temporarily position the second light emitting unit 200R on the second substrate 302. In some embodiments, the material of the adhesion layer 304 may include, for example, a photo-curable material, a thermal-curable material, a photo-thermal-curable material, a moisture-curable material, other suitable materials, or a combination thereof, but the invention is not limited thereto. In some embodiments, the second light emitting unit 200R may be, for example, partially embedded in the adhesive layer 304. In some embodiments, the adhesive layer 304 may have, for example, a slight adhesive property before curing, so that the position of the second light emitting unit 200R disposed thereon can be appropriately adjusted to reduce the occurrence of the problem of mutual contact or short circuit between different light emitting units.
In some embodiments, the material of the adhesion layer 304 may include, for example, an Anisotropic Conductive Film (ACF), an Anisotropic Conductive Paste (ACP), a non-conductive adhesive film (NCF), a non-conductive paste (NCP), a photoresist, or a combination thereof, but the invention is not limited thereto. The Anisotropic Conductive Film (ACF) or the Anisotropic Conductive Paste (ACP) may include a polymer material and conductive particles (304 p as shown), and the conductive particles may provide electrical connection between the light emitting unit and a conductive pad on a target substrate (e.g., an array substrate, but the invention is not limited thereto). In embodiments using a non-conductive adhesive film (NCF), a non-conductive paste (NCF), or a photoresist as the adhesive layer 304, the first light emitting unit 200U and the second light emitting unit 200R, which are not replaced, may be bonded or electrically connected to a target substrate (e.g., an array substrate) by an eutectic bonding process (as shown in fig. 3A to 3H). Furthermore, in some embodiments, the adhesive layer 304 may be disposed by, for example, coating, spraying, screen printing, attaching, transferring, photolithography, other suitable methods, or a combination thereof, but the invention is not limited thereto. In some embodiments, the adhesion layer 304 may be a single layer or a multi-layer structure of materials, for example.
Next, referring to fig. 1 and fig. 2E, in step S17, the first light-emitting unit 200U on the first substrate 102 that is not replaced is transferred onto the second substrate 302. In other words, the first light emitting cell 200U on the first substrate 102 having the vacancy VC shown in fig. 2B is transferred onto the second substrate 302. In detail, in some embodiments, the first substrate 102 with the empty space VC may be removed from the carrier substrate 104, and then the device 306 is used to grab or transfer the first substrate 102 (with the empty space VC) and transfer the first light-emitting unit 200U on the first substrate 102 to the second substrate 302. In some embodiments, the first substrate 102 may be aligned with the second substrate 302, for example, and then the first light-emitting unit 200U on the first substrate 102 is transferred to the second substrate 302. For example, the alignment may be performed optically or mechanically, but the present invention is not limited thereto, and the alignment step is not necessary. In some embodiments, the device 306 may grasp the first substrate 102 by vacuum, electrostatic, magnetic, or van der waals forces, for example, but the invention is not limited thereto. In addition, as shown in fig. 2E, the first light emitting unit 200U may be temporarily positioned in the adhesive layer 304, for example, while avoiding the position where the second light emitting unit 200R is transferred to the second substrate 302. In some embodiments, the first light emitting unit 200U may also be partially embedded in the adhesive layer 304.
Furthermore, in some embodiments, the second substrate 302 may be, for example, an array substrate (or a target substrate), but the invention is not limited thereto. The material of the second substrate 302 may be, for example, glass, quartz, sapphire, plastic, polymer, other suitable materials, or a combination thereof, but the invention is not limited thereto. For example, the second substrate 302 may be, for example, a driving substrate of the electronic device 100A. In detail, the second substrate 302 may include a driving circuit (not shown), for example, the driving circuit may be an active driving circuit or a passive driving circuit. The driving circuit may include, for example, a transistor (e.g., a switching transistor, a driving transistor, or other transistor), a data line, a scan line, a conductive pad, or a dielectric layer or other lines, etc., but the present invention is not limited thereto. The switching transistor may be used, for example, to control switching of the first light emitting unit 200U or the second light emitting unit 200R. In some embodiments, the driving circuit may control the first light emitting unit 200U or the second light emitting unit 200R by an external Integrated Circuit (IC) or a microchip. In some embodiments, the second substrate 302 may be, for example, an intermediate substrate for temporarily carrying the first light-emitting unit 200U or the second light-emitting unit 200R (as shown in the embodiments of fig. 3A to 3H).
In some embodiments, the sequence of the steps S15 and S17 may be interchanged, that is, the first light emitting unit 200U on the first substrate 102 is transferred to the second substrate 302, and then the second light emitting unit 200R on the first substrate 102' is transferred to the second substrate 302, and it should be noted that the first light emitting unit 200U and the second light emitting unit 200R are prevented from being overlapped with each other on the second substrate 302, that is, the first light emitting unit 200U and the second light emitting unit 200R are electrically connected to different conductive pads (not shown, and will be described in the following description) on the second substrate 302, respectively.
Next, referring to fig. 1 and 2F, in step S19, the first substrate 102 may be removed by a removal process LO. In some embodiments, the process LO is removed as described above. For example, the first substrate 102 may be directly etched away by a dry (or wet) chemical etching in the removal process LO. The removal process LO may, for example, be directed to an interface S between the first substrate 102 and the first light emitting unit 200U or the second light emitting unit 200R1And (4) stripping.
In addition, in some embodiments, before the first substrate 102 is removed (step S19), a curing process may be performed on the adhesive layer 304, for example, to fix the first light-emitting unit 200U and the second light-emitting unit 200R in the adhesive layer. In some embodiments, when the adhesive layer 304 comprises a thermosetting material, a heating step may be performed on the adhesive layer 304 to perform a curing process, for example. In some embodiments, the temperature of the heating step ranges from about 100 ℃ to 400 ℃, although the invention is not limited thereto. In some embodiments, the pressure of the curing process ranges from about 1 to 80 million pascals (Mpa), but the invention is not limited thereto. In some embodiments, when the adhesive layer 304 comprises a photo-curable material, the adhesive layer 304 may be irradiated with light of a specific wavelength, such as UV light or visible light, to perform the curing step. In some embodiments, the adhesive layer 304 may be left for an extended period of time, for example, to perform the curing step. Furthermore, in some embodiments, the adhesion layer 304 may be disposed on the second substrate 302, for example, patterned. In some embodiments, the adhesive layer 304 may also have the effect of acting as a filler (underfill) for the bottom of the light emitting unit. The arrangement of the through-fill can reduce the probability of short circuits between adjacent light emitting cells or reduce corrosion of the conductive pad (e.g., the conductive pad 308 in fig. 4A).
Next, please refer to FIG. 1 and FIG. 2G, in some casesIn an embodiment, the method 10 further includes a step S21 of performing a cleaning process CL on the light emitting surface of the first light emitting unit 200U or the second light emitting unit 200R. In some embodiments, the light emitting face may be, for example, a top surface of the first semiconductor layer 202 of the first light emitting unit 200U or the second light emitting unit 200R. In some embodiments, the energy of the removal may cause the top surface (interface S) of the first semiconductor layer 202 of the first light emitting unit 200U or the second light emitting unit 200R1) And becomes coarse. In some embodiments, the top surface (interface S) of the first semiconductor layer 202 of the first light emitting cell 200U or the second light emitting cell 200R1) The roughness of (a) is in the range of about 0.1 μm to 2 μm. In some embodiments, the top surface (interface S) of the first semiconductor layer 202 of the first light emitting cell 200U or the second light emitting cell 200R1) The roughness of (a) is in the range of about 0.1 μm to 0.5 μm.
In addition, in some embodiments, the light emitting surface of the first light emitting unit 200U or the second light emitting unit 200R can be cleaned by an etching step according to the condition, so as to change the roughness of the light emitting surface of the first light emitting unit 200U or the second light emitting unit 200R, and change or adjust the light emitting path. In some embodiments, the etching process includes a wet etching process, but the invention is not limited thereto.
As shown in fig. 2H, the first light-emitting unit 200U or the second light-emitting unit 200R is disposed on the second substrate 302, and the first light-emitting unit 200U or the second light-emitting unit 200R is fixed by the adhesive layer 304. In addition, in some embodiments, a test T (not shown) may be performed on the assembled electronic device 100A, for example, to test whether the performance of the first light-emitting unit 200U or the second light-emitting unit 200R is normal.
Referring to fig. 3A-3H, fig. 3A-3H are cross-sectional views of an electronic device 100B formed by the method 20 of manufacturing an electronic device at an intermediate stage of manufacture, according to further embodiments of the present invention. It should be understood that the same or similar components or elements as those described above are denoted by the same or similar reference numerals, and the same or similar materials and functions as those described above are omitted for brevity. The method 20 for manufacturing the electronic device shown in fig. 3A to 3H is similar to the method 10 for manufacturing the electronic device shown in fig. 2A to 2H, except that in the embodiment shown in fig. 3A to 3H, the first light emitting units 200U disposed on different first substrates 102 can be replaced (or repaired) at the same time. In other words, the first light emitting units 200U on the plurality of first substrates 102 may be replaced at the same time.
Specifically, as shown in fig. 3A, first, a plurality of first light emitting units 200U disposed on the first substrate 102 may be detected T to select a first light emitting unit 200U' to be replaced. In detail, for example, the result obtained by detecting T can be used to select the first light-emitting unit 200U' to be replaced disposed on a different first substrate 102. Next, the removal process LO may be performed to remove the first light-emitting unit 200U 'to be replaced from the first substrate 102, so that an empty space VC (as shown in fig. 3B) corresponding to the first light-emitting unit 200U' to be replaced may be formed on a different first substrate 102, for example.
Next, as shown in fig. 3C and 3D, the second light emitting units 200R on the first substrate 102 'are transferred to the second substrate 302 simultaneously or in batches, and the positions where the second light emitting units 200R are disposed correspond to the vacant positions VC of the first light emitting units 200U' to be replaced on the first substrate 102, respectively, for example. In detail, in this embodiment, the second light emitting units 200R on the same first substrate 102' can be used to replace the first light emitting units 200U on different first substrates 102 simultaneously or in batches, for example. In some embodiments, the first light emitting units 200U on two or more first substrates 102 may be replaced simultaneously or in batches, but the present invention is not limited thereto. In addition, in this embodiment, the adhesive layer 304 may be formed on the second substrate 302, for example, before the second light emitting unit 200R is transferred to the second substrate 302. In some embodiments, the adhesive layer 304 on the second substrate 302 may be continuous or discontinuous (i.e., patterned adhesive layer 304), and may be adjusted as required by subsequent processes.
Next, as shown in fig. 3E, the first light-emitting units 200U that are not replaced on the first substrate 102 may be transferred onto the second substrate 302, for example, respectively. As shown in fig. 3, the first light emitting unit 200U avoidsThe second light emitting unit 200R is temporarily positioned in the adhesive layer 304. The first light emitting unit 200U and the second light emitting unit 200R may be, for example, partially embedded in the adhesive layer 304. Next, as shown in fig. 3F, the first substrate 102 may be removed by a removal process LO, for example. The removal process LO may, for example, be directed to the interface S between the first substrate 102 and the first light emitting unit 200U or the second light emitting unit 200R1And (4) stripping. In some embodiments, after the removal process LO, the cleaning process CL may be performed on the light emitting surfaces of the first light emitting unit 200U and the second light emitting unit 200R. Next, as shown in fig. 3G, the first light emitting unit 200U and the replaced second light emitting unit 200R may be temporarily fixed on the second substrate 302, for example, by an adhesive layer 304. In some embodiments, the adhesive layer 304 or the second substrate 302 may have a flexible property, for example, the distance between the first light-emitting unit 200U and the second light-emitting unit 200R formed on the second substrate 302 can be adjusted by stretching the adhesive layer 304 or the second substrate 302, so as to improve the quality of the electronic device and reduce the probability of short circuit caused by the light-emitting units being too close to each other.
In this embodiment, the second substrate 302 can be used as an intermediate substrate for temporarily carrying the first light-emitting unit 200U or the second light-emitting unit 200R to be replaced from a different first substrate 102. Next, as shown in fig. 3H, the second substrate 302 may be removed, and the adhesive layer 304 and the first light-emitting unit 200U or the second light-emitting unit 200R temporarily fixed on the second substrate 302 may be transferred onto the third substrate 402. In this embodiment, the third substrate 402 may be an array substrate, for example. For example, the third substrate 402 may be used as a driving substrate of an electronic device, for example. In detail, the third substrate 402 may include a driving circuit (not shown), and the description of the driving substrate is repeated as described above. In some embodiments, the adhesive layer 304 and the first and second light-emitting units 200U and 200R formed thereon can be transferred to a different third substrate 402 or the same third substrate 402.
In this embodiment, the first light emitting unit 200U or the second light emitting unit 200R that is not replaced may be bonded to the third substrate 402, for example, by an eutectic bonding process (eutectic bonding process). In detail, the first light emitting unit 200U or the second light emitting unit 200R may be electrically connected to the third substrate 402 by a eutectic bonding process. In some embodiments, the formed electronic device 100B may be, for example, a tiled display (tiled display), and the first light-emitting unit 200U and the replaced second light-emitting unit 200R may be, for example, disposed on different third substrates 402 adjacent to each other, but the invention is not limited thereto.
Next, referring to fig. 4A, fig. 4A is a schematic cross-sectional view illustrating an electronic device 100A according to some embodiments of the invention. As mentioned above, in some embodiments, the material of the adhesive layer 304 may include Anisotropic Conductive Film (ACF) or Anisotropic Conductive Paste (ACP). In detail, in some embodiments, the adhesion layer 304 may include, for example, a polymer material as the matrix 304m and the conductive particles 304p distributed therein. In some embodiments, the polymeric material may comprise, for example, an organic material, although the invention is not limited thereto. The organic material may include, for example, epoxy resin (epoxy), acrylic resin (acrylic resin) such as polymethyl methacrylate (PMMA), benzocyclobutene (BCB), polyimide, polyester, Polydimethylsiloxane (PDMS), other suitable material, or a combination of the foregoing, but the present invention is not limited thereto. Furthermore, in some embodiments, the conductive particles 304p may be, for example, a polymer surface with a compressible characteristic plated with a conductive material, a solder ball, or a combination thereof, but the invention is not limited thereto. The material of the conductive material may include, for example, nickel (Ni), gold (Au), platinum (Pt), silver (Ag), copper (Cu), iron (Fe), nickel (Ni), tin (Sn), aluminum (Al), magnesium (Mg), palladium (Pd), iridium (Ir), rhodium (Rh), ruthenium (Ru), zinc (Zn), other suitable conductive materials, alloys thereof, or combinations thereof, but the present invention is not limited thereto. In some embodiments, the conductive particles 304p have a particle size ranging between about 1 μm to 30 μm, but the present invention is not limited thereto. In some embodiments, the conductive particles 304p have a particle size ranging between about 1 μm to 10 μm.
As shown in fig. 4A, in some embodiments, the conductive particles 304p in the adhesive layer 304 may be disposed between the electrodes (e.g., the first electrode 208 and the second electrode 210) of the first light-emitting unit 200U or the second light-emitting unit 200R and the conductive pad 308 on the second substrate 302, for example. Herein, the second substrate 302 can be used as an array substrate, for example, and the conductive pads 308 can be electrically connected to a driving circuit disposed on the second substrate 302, for example. The conductive particles 304p may, for example, contact electrodes (e.g., the first electrode 208 and the second electrode 210) of the first light-emitting unit 200U or the second light-emitting unit 200R and the conductive pads 308 to electrically connect the first light-emitting unit 200U with the conductive pads 308 on the second substrate 302 and the second light-emitting unit 200R with the conductive pads 308 on the second substrate 302. In addition, as shown in fig. 4A, most of the conductive particles 304p may be disposed between the first light emitting unit 200U and the conductive pad 308 on the second substrate 302 or between the second light emitting unit 200R and the conductive pad 308 on the second substrate 302, for example.
In some embodiments, the conductive pad 308 may comprise, for example, a metallic conductive material, a transparent conductive material, or a combination thereof. The metallic conductive material may include, for example, copper (Cu), aluminum (Al), molybdenum (Mo), tungsten (W), gold (Au), chromium (Cr), nickel (Ni), a copper alloy, an aluminum alloy, a molybdenum alloy, a tungsten alloy, a gold alloy, a chromium alloy, a nickel alloy, other suitable materials, or a combination of the foregoing, but the present invention is not limited thereto. The transparent conductive material may include, for example, Indium Tin Oxide (ITO), tin oxide (SnO), Indium Zinc Oxide (IZO), Indium Gallium Zinc Oxide (IGZO), Indium Tin Zinc Oxide (ITZO), other suitable materials, or a combination of the foregoing, but the present invention is not limited thereto.
In addition, as shown in FIG. 4A, the adhesive layer 304 may have a first height H, for example1The first light emitting unit 200U or the second light emitting unit 200R has a second height H2. First height H1Can be defined as the maximum distance between the top surface 302S of the second substrate 302 and the top surface 304S of the adhesive layer 304 in the normal direction (along the Z direction) of the second substrate 302, the second height H2May be defined, for example, as the maximum distance between the top surface 302S of the second substrate 302 to the top surface 200S of the first light-emitting unit 200U or the second light-emitting unit 200R in the normal direction (in the Z direction) of the second substrate 302. In some embodiments, the second height H2May be, for example, greater than the first height H1. The adhesive layer 304 may, for example, include a light-shielding or light-absorbing material, i.e., the adhesive layer 304 may, for example, serve as a light-shielding layer for the first light-emitting unit 200U or the second light-emitting unit 200R, and thus may not be used for additionally disposing a light-shielding layer on the second substrate 302.
Next, please refer to fig. 4B, which corresponds to a top view of the region a shown in fig. 4A (a top view in XY plane). It should be understood that some components, such as the first light emitting unit 200U, are omitted in fig. 4B for clarity of illustration of the conductive particles 304p and the conductive pads 308. As shown in fig. 4B, the adhesion layer 304 may have a patterned arrangement of conductive particles 304p, for example. In detail, the conductive particles 304p may be arranged corresponding to the position of the conductive pads 308, for example, and the conductive particles 304p may be arranged corresponding to the position of the electrodes (e.g., the first electrode 208 and the second electrode 210) of the light emitting unit, for example. In other words, most of the conductive particles 304p and the conductive pad 308 or the electrodes (the first electrode 208 and the second electrode 210) of the light emitting unit may be disposed to overlap in a normal direction of the substrate 304m, for example. In some embodiments, the conductive particles 304p may, for example, surround the conductive pad 308, and the region where the conductive particles 304p are disposed or distributed may be defined as region R. In some embodiments, the distance d between the region R and the outer edge 308E of the conductive pad 3081May, for example, range between about 0 μm to 30 μm. As mentioned above, the patterned arrangement of the conductive particles 304p can reduce the amount of the conductive particles 304p in the adhesive layer 304, and reduce short circuit caused by the conductive particles 304p on different conductive pads 308 being too close to each other. In some embodiments, the adhesive layer 304 may have conductive particles (not shown) arranged in a matrix, for example, that is, the conductive particles are regularly disposed in the adhesive layer 304. In some embodiments, the conductive particles in the adhesion layer 304 may, for example, be unpatterned, e.g., the conductive particles may be randomly distributed in the adhesion layer 304.
Moreover, it should be understood that the shape of the conductive pad 308 is not limited to the circular shape shown in the figures, and in other embodiments, the conductive pad 308 may have any suitable shape according to practical requirements, such as a rectangle and a polygon, but the invention is not limited thereto.
Next, referring to fig. 5, fig. 5 shows a top view of an electronic device 100C (a top view in XY plane) according to some embodiments of the present invention. In some embodiments, the electronic device 100C is an electronic device formed by the method 10 of manufacturing an electronic device described above. In some embodiments, since the first light-emitting units 200U originally disposed on the first substrate 102 are manufactured or arranged by, for example, a photolithography process, the pitch error between the first light-emitting units 200U originally disposed on the first substrate 102 is small (e.g., smaller than about ± 5 μm, but the invention is not limited thereto). On the other hand, the replaced second light-emitting unit 200R may be placed by the device 306, for example, since the controllable pitch error of the stage of the device 306 may be relatively large (e.g., smaller than about ± 15 μm, but the invention is not limited thereto). Therefore, in some embodiments, the spacing between the first light emitting unit 200U and the second light emitting unit 200R on the second substrate 302 may be different from the spacing between the first light emitting units 200U.
The term "pitch" as used herein may be defined as the distance between the center point of a region (pixel) of one light-emitting unit and the center point of a region (pixel) of another light-emitting unit adjacent thereto. Alternatively, the "pitch" may be defined as a distance between a left edge of a region (pixel) of one light emitting unit and a left edge of a center point of a region (pixel) of another light emitting unit adjacent thereto. It should be noted that the two light emitting units need to emit light of the same color (e.g., red, green, or blue light, etc., but the invention is not limited thereto). In addition, the area of one light emitting cell may be defined by the boundary of the first semiconductor layer 202 of the light emitting cell structure, for example, in the top view direction.
In some embodiments, a first light emitting unit 200U (labeled 200U)1For convenience of explanation) and another first light emitting unit 200U (denoted as 200U) adjacent thereto in the first direction (Y direction)2) Has a first pitch P therebetween1. First pitch P1Is defined as a first light emitting unit 200U1And the center point of the first light emitting unit 200U2Is a distance in a first direction (Y direction), or, a first pitch P1Is defined as a first light emitting unit 200U1To the left ofEdge and first light emitting unit 200U2Is located at a distance in the first direction (Y direction). In some embodiments, a first light emitting unit 200U (labeled 200U)3) And a second light emitting unit 200R adjacent thereto along the first direction (Y direction) has a second pitch P2. Second pitch P2Is defined as a first light emitting unit 200U3The distance of the center point of (b) and the center point of the second light emitting unit 200R in the first direction (Y direction), or the second pitch P2Is defined as a first light-emitting unit 200U3And the left edge of the second light emitting unit 200R in the first direction (Y direction). In some embodiments, the first pitch P1And a second pitch P2May for example be different. In some embodiments, the first pitch P1And a second pitch P2The difference therebetween may range, for example, from about 0.1 μm to about 20 μm. In some embodiments, the first pitch P1And a second pitch P2The difference therebetween may range, for example, approximately between 1 μm to 20 μm, although the invention is not limited thereto.
In addition, in some embodiments, a first light emitting unit 200U (labeled 200U)1)And another first light emitting unit 200U (denoted as 200U) adjacent thereto in the second direction (X direction)3) Has a third pitch P therebetween3. Third pitch P3Is a first light-emitting unit 200U1And the center point of the first light emitting unit 200U3Is a distance in the second direction (X direction), or, alternatively, a third distance P3Is defined as a first light emitting unit 200U1And the first light emitting unit 200U3Is located at a distance in the second direction (X direction). In some embodiments, a first light emitting unit 200U (labeled 200U)2) And a second light emitting unit 200R adjacent to the first light emitting unit along the second direction has a fourth pitch P4. Fourth pitch P4Is defined as a first light emitting unit 200U2Is spaced from the center point of the second light emitting unit 200R in the second direction (X direction), or alternatively, the fourth pitch P4Is defined as a first light emitting unit 200U2Upper edge ofThe distance between the edge and the upper edge of the second light emitting unit 200R in the second direction (X direction). In some embodiments, the third pitch P3And a fourth pitch P4May for example be different. In some embodiments, the third pitch P3To a fourth pitch P4The difference therebetween may range, for example, from about 0.1 μm to 20 μm or from 1 μm to 20 μm.
In the embodiment shown in FIG. 5, the first pitch P is1A second distance P from2Or a third pitch P3And a fourth pitch P4The comparison between the first light-emitting unit 200U (including the first light-emitting unit 200U) is selected1To the first light-emitting unit 200U3) And the second light emitting unit 200R may, for example, emit light of the same color, such as blue light, but the present invention is not limited thereto. In some embodiments, the first light-emitting unit 200U (including the first light-emitting unit 200U)1To the first light emitting unit 200U3) And the second light emitting unit 200R may emit red or green light, for example. In some embodiments, the first light-emitting unit 200U (including the first light-emitting unit 200U)1To the first light emitting unit 200U3) Or the second light emitting unit 200R emits, for example, blue light, and the first light emitting unit 200U (including the first light emitting unit 200U)1To the first light-emitting unit 200U3) Or a wavelength conversion layer (e.g., quantum dots or organic fluorescent material, but the present invention is not limited thereto) is additionally disposed above the second light emitting unit 200R, for example, and the blue light is excited by the wavelength conversion layer to generate light of other colors, for example, including red light or green light, but the present invention is not limited thereto.
Referring to fig. 6, a top view of an electronic device 100D (a top view in an XY plane) is shown in some embodiments of the present disclosure. In the embodiment shown in fig. 6, the first light-emitting unit 200U and the second light-emitting unit 200R of the electronic device 100D may emit light with different colors, for example, a part of the first light-emitting unit 200U or the second light-emitting unit 200R may emit red light, a part of the first light-emitting unit 200U or the second light-emitting unit 200R may emit green light, and a part of the first light-emitting unit 200U or the second light-emitting unit 200R may emit blue light. The first light emitting unit 200U or the second light emitting unit 200R shown in the figure with the same dot can have the same color, for example.
Similarly, in this embodiment, a first light emitting unit 200U (labeled 200U)1) And another first light emitting unit 200U (denoted as 200U) adjacent thereto in the first direction2) Has a first pitch P therebetween1. In some embodiments, a first light emitting unit 200U (labeled 200U)3) And a second light emitting unit 200R adjacent thereto along the first direction has a second pitch P therebetween2. In some embodiments, the first pitch P1And a second pitch P2May for example be different. In some embodiments, the first pitch P1And a second pitch P2The difference between may range, for example, from 0.1 μm to about 20 μm or from about 1 μm to about 20 μm.
In addition, in some embodiments, a first light emitting unit 200U and (labeled 200U)1) Another first light emitting unit 200U (labeled 200) adjacent thereto in the second directionU3) Has a third pitch P therebetween3. In some embodiments, a first light emitting unit 200U (labeled 200U)2) And a second light emitting unit 200R adjacent to the first light emitting unit along the second direction has a fourth pitch P4. In some embodiments, the third pitch P3And a fourth pitch P4May for example be different. In some embodiments, the third pitch P3And a fourth pitch P4The difference therebetween may range, for example, from about 0.1 μm to 20 μm or 1 μm to 20 μm.
Referring to fig. 7, fig. 7 is a top view (a top view in XY plane) of an electronic device 100E according to some embodiments of the invention. The embodiment shown in fig. 7 is similar to the embodiment shown in fig. 5, except that the electronic device 100E in fig. 7 is a tiled electronic device. As shown in fig. 7, the first light-emitting unit 200U and the second light-emitting unit 200R are disposed on the adjacent but different third substrate 402.
In summary, the manufacturing method of the electronic device according to some embodiments of the present invention can replace (or repair) the light emitting units in batch, and particularly, the method can replace a plurality of light emitting units simultaneously, and can be applied to light emitting units of various sizes without being limited by the size of the light emitting units. The manufacturing method is beneficial to improving the replacement efficiency or yield of the light emitting unit in the micro LED device.
Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification, but it is to be understood that any process, machine, manufacture, composition of matter, means, method and steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present application. Accordingly, the scope of the present application includes the processes, machines, manufacture, compositions of matter, means, methods, and steps described above. In addition, each claim constitutes a separate embodiment, and the scope of protection of the present invention also includes combinations of the respective claims and embodiments. The scope of the invention is to be determined by the claims appended hereto.
Claims (5)
1. An electronic device, comprising:
a substrate;
a plurality of conductive pads disposed on the substrate;
an adhesive layer disposed on the substrate and having a plurality of conductive particles arranged in a patterned manner, wherein the plurality of conductive particles are arranged corresponding to the plurality of conductive pads, and a distance between a region where the plurality of conductive particles are disposed and an outer edge of at least one of the plurality of conductive pads is between 0 μm and 30 μm; and
a first diode unit, a second diode unit, a third diode unit and a fourth diode unit disposed on the substrate and electrically connected to the conductive pads through the conductive particles, respectively;
wherein the second diode unit is adjacent to the first diode unit along a first direction, the fourth diode unit is adjacent to the third diode unit along the first direction, the third diode unit is adjacent to the first diode unit along a second direction perpendicular to the first direction, the fourth diode unit is adjacent to the second diode unit along the second direction,
wherein a first distance between the first diode unit and the second diode unit is different from a second distance between the third diode unit and the fourth diode unit, wherein the adhesive layer has a first height, the first diode unit has a second height, and the second height is greater than the first height.
2. The electronic device of claim 1, wherein a third pitch between the first diode unit and the third diode unit is different from a fourth pitch between the second diode unit and the fourth diode unit.
3. The electronic device of claim 1, wherein the difference between the first pitch and the second pitch is in a range from 0.1 μm to 20 μm.
4. The electronic device of claim 2, wherein the difference between the third pitch and the fourth pitch is in a range from 0.1 μm to 20 μm.
5. An electronic device, comprising:
a substrate;
a plurality of conductive pads disposed on the substrate;
a first light emitting unit, a second light emitting unit, a third light emitting unit and a fourth light emitting unit disposed on the substrate; and
a plurality of conductive particles, wherein the first light emitting unit, the second light emitting unit, the third light emitting unit, and the fourth light emitting unit are electrically connected to the plurality of conductive pads through the plurality of conductive particles, respectively, and a distance between a region where the plurality of conductive particles are disposed and an outer edge of at least one of the plurality of conductive pads is between 0 μm and 30 μm;
wherein the second light-emitting unit is adjacent to the first light-emitting unit along a first direction, the fourth light-emitting unit is adjacent to the third light-emitting unit along the first direction, the third light-emitting unit is adjacent to the first light-emitting unit along a second direction perpendicular to the first direction, the fourth light-emitting unit is adjacent to the second light-emitting unit along the second direction,
wherein a first spacing between the first light emitting unit and the second light emitting unit is different from a second spacing between the third light emitting unit and the fourth light emitting unit.
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| KR101688163B1 (en) * | 2015-03-30 | 2016-12-20 | 엘지전자 주식회사 | Display device using semiconductor light emitting device and method for manufacturing the same |
| KR102319315B1 (en) * | 2015-05-14 | 2021-10-29 | 삼성디스플레이 주식회사 | Organic light emitting diode display |
| KR102604368B1 (en) * | 2016-07-28 | 2023-11-22 | 엘지디스플레이 주식회사 | Organic light emitting display panel, organic light emitting display device, driving circuit, controller, and driving method |
| TWI723207B (en) * | 2016-08-18 | 2021-04-01 | 新世紀光電股份有限公司 | Micro light emitting diode and manufacturing method thereof |
| KR102613339B1 (en) | 2016-08-30 | 2023-12-13 | 엘지디스플레이 주식회사 | Organic light-emitting display device, controller |
| US10340256B2 (en) * | 2016-09-14 | 2019-07-02 | Innolux Corporation | Display devices |
-
2018
- 2018-07-24 CN CN202210422287.1A patent/CN114759060A/en active Pending
- 2018-07-24 CN CN201810820379.9A patent/CN109920812B/en active Active
- 2018-07-24 CN CN202210421319.6A patent/CN114759059A/en active Pending
- 2018-10-19 US US16/165,091 patent/US10878734B1/en active Active
- 2018-11-23 KR KR1020180146106A patent/KR20190070851A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| US10878734B1 (en) | 2020-12-29 |
| CN109920812A (en) | 2019-06-21 |
| CN114759060A (en) | 2022-07-15 |
| CN109920812B (en) | 2022-05-06 |
| KR20190070851A (en) | 2019-06-21 |
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